Chaeles bean



nitrh'tstrs Quint ffice,

CHARLES BEAN, OF EAST DOUGLASSKMASSACHUSETTS Letters Patent No. 81,830, dated August 25, 1865.

IMPROVEMENT I'N STEAM-GENERATORS.

TO ALE WHOM-IT MAY CONCERN:

Be it known that I, CHARLES BEAN, of East Douglass, in the county of Worcester, and State of Massachusetts, have invented a new and useful Improvement in Sectional Steam-Boilers; and I do hereby declare that the following is a. full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, referencebeing had to the accompanying drawings, forming part of this specication.

This invention relates to improvements in steam-generators, whereby they are rendered more durable and more eective than those of the 4usual construction; and the invention consists in the construction ofthe boiler in sections of uniform size, and united, as will be hereinafter'described.

` Figure 1 represents an elevation of the section, showing the construction, and provision made'for the circulation of the water, and the action of the heat or products of combustion.

Figure 2 represents three of the sections united, as when in use for the generation ofsteam.

Similar letters of reference indicate corresponding parts.. A

As the boiler is but a duplication of parts, or a series of'sections ofthe same constructionsccured together, as seen in iig. 2, it is not deemed necessary to show more than one section to illustrate lmy invention.

TheY section isformed of two outside upright tubes, A, and Vany required number of'inner tubes, B, the whole being cast together in one piece, but with apertures, C, which allow of the circula-tion of water between them all.

Within the tubes C, and secured steam-tight at top and bottom, are ilues or fire-tubes, D, through which a portion of theiproducts of combustion passes.

/ Eindicates the water-line, and

F the steam-space.

When the sections are thus formed, they are secured together by bolt-rods passing through the orifices, G, as seen in the group,-fig 2.

They are setin an arch of masonry, or covered by an iron casing, the furnace or fireplace being beneath.

The smoke and products of combustion pass up through the flues D, and between the tubes B, and escape through a properly-constructed chimney from the arch.

The feed-water is forced into any oi' the outside tubes, A, and the steam maybe taken from thc upper part of any of the same tubes, as may be foundlmost convenient. v

It will be seen that, by this arrangement, the iron is put into the very best possible form for resisting pressure, and that a very extended heat-radiating surface is exposed for the generation of steam.

Although in contact with the water, the steam will be more or less superheated in the tubes A.

The' tubes A'would be connected by a common steam-pipe, from which the steam would be discharged to the engine, or to wherever required.

By constructing a-boiler-in this manner, it can ho increased in size at pleasure, by adding, more sections, and, being thus pnt together in sections, it is rendered portable, and can be put up in situations where boilers of the ordinary construction cannot ind entrance, on account of their bulk and weight. 4

Itis well understood by engineers that metal in the small tubular form is bes't calculated to withstand pressure, and small tubes, when properly situated, are certainly best and most effective for generating steam.

The water in the tubes B, in the form of a thin sheet, fills an annular space around the tire-dues, so that the whole surface of the tubes is rendered effective.

If, from any cause, a section shouldfail, it canreadily be removed, and the space filled by another, or if anothersection is not at hand, the adjoining sections may be brought together, thus dispensing with the section altogether,

I claim as new, and desire te secure by Letters Patent- The construction and combination of the section, formed of the tubes A B and the flues D, with the apertures C, substantially asA herein shown and described.

cHhRLEs BEAN.

Witnesses:

WM. M. GARDNER, Jenn ABBOTT. 

